Pool filtration system

Abstract

A filtration grid cover pre-impregnated with a filtering media such as diatomaceous earth is provided. The cover may have a pouch configuration sized and configured to receive a filtration grid of a diatomaceous earth filtration system. The entry aperture of the cover may be positioned at a top edge, side edge or bottom of the cover. The filtering media may be pre-impregnated on an inner surface or an outer surface of the cover. Various means of enclosing the filtration grid in the cover is disclosed or are disclosed such as with buttons, hooks and loops, adhesives, etc.

1 . A pool filtration grid for removing particulate in pool water, the grid comprising:
 a frame defining opposed first and second sides, the frame having a web configuration for allowing pool water to flow through the webbed frame;   a water permeable membrane attachable to the frame; and   a filter media pre-impregnated on at least a portion of the water permeable membrane, the filter media operative to capture the particulate when water flows through the webbed frame.   
     
     
         2 . The pool filtration grid of  claim 1  wherein the filtering media is evenly distributed on at least a portion of the membrane. 
     
     
         3 . The pool filtration grid of  claim 1  wherein the membrane defines an effective flow area through which a majority of the pool water flows and the filtering media is evenly distributed over the effective flow area of the membrane. 
     
     
         4 . The pool filtration grid of  claim 1  wherein the membrane is fabricated from cellulose fiber. 
     
     
         5 . The pool filtration grid of  claim 1  further comprising a liner disposed between the frame and the membrane. 
     
     
         6 . The pool filtration grid of  claim 1  wherein the membrane comprises:
 a first layer defining an outer peripheral portion;   a second layer defining an outer peripheral portion, the outer peripheral portions of the first and second layers being attached to each other to form a pouch defining an inner surface;   wherein the filtering media is pre-impregnated on the inner surface of the pouch.   
     
     
         7 . The pool filtration grid of  claim 5  wherein the liner is a mesh. 
     
     
         8 . The pool filtration grid of  claim 6  wherein the pouch is closeable with hooks and loops, adhesive, buttons, ties, snaps or elastic band. 
     
     
         9 . The pool filtration grid of  claim 1  wherein the membrane is polyethylene material. 
     
     
         10 . The pool filtration grid of  claim 9  wherein the polyethylene material is spun and woven. 
     
     
         11 . The pool filtration grid of  claim 1  wherein the filtering media is diatomaceous earth or diatomaceous earth substitute. 
     
     
         12 . The pool filtration grid of  claim 1  wherein the frame has an arc shape. 
     
     
         13 . A pool filtration assembly for removing particulate in pool water, the assembly comprising:
 a filtration grid defining an exit aperture and an exterior side;   a water permeable membrane disposed on an exterior side of the filtration grid and having an aperture sized and configured to the exit aperture of the filtration grid to allow the pool water to exit the filtration grid; and   a filtering media pre-impregnated on at least a portion of the water permeable membrane, the filtering media operative to capture the particulate when water flows through the filtration grid.   
     
     
         14 . The pool filtration assembly of  claim 13  wherein the water permeable membrane has a pouch configuration sized and configured to receive the filtration grid. 
     
     
         15 . The pool filtration assembly of  claim 13  wherein the filtration grid has a circular configuration. 
     
     
         16 . A cover for a pool filtration grid, the cover comprising:
 a water permeable membrane disposable on an exterior side of the pool filtration grid, the water permeable membrane defining an aperture sized and configured to an exit aperture of the pool filter grid to allow water to flow through the exit aperture of the pool filter grid;   a filtering media pre-impregnated on at least a portion of the water permeable membrane, the filtering media operative to capture the particulate when water flows through the filter grid.   
     
     
         17 . The cover of  claim 16  wherein the filtering media is pre-impregnated on an inner surface of the water permeable membrane. 
     
     
         18 . The cover of  claim 16  wherein the water permeable membrane is polyethylene material.